Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 6:43AM||Sunset 8:29PM||Thursday August 6, 2020 8:26 PM EDT (00:26 UTC)||Moonrise 9:37PM||Moonset 8:27AM||Illumination 91%|
7 Day Forecast for Marine Location Near Walhalla, SCHourly EDIT Help
Area Discussion for - Greenville-Spartanburg, SC  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS62 KGSP 062336 AFDGSP
Area Forecast Discussion National Weather Service Greenville-Spartanburg SC 736 PM EDT Thu Aug 6 2020
SYNOPSIS. Passing upper-level disturbances will produce greater than typical coverage of showers and thunderstorms through Friday. A return to more typical isolated to scattered summertime thunderstorm activity is expected over the weekend as weak drying arrives from the west. Moisture will gradually return late in the weekend through the middle of next week to support a more active pattern once again.
NEAR TERM /THROUGH FRIDAY/. As of 735 PM Thursday: Convective coverage will remain high across the mountains and I-40 corridor this evening, with lower coverage elsewhere. While a strong to severe storm is possible, flooding will be a bigger threat as echoes train over the same areas, especially where coverage is better.
Persistence will be the rule for the weather and the forecast of the same for the next 24 hours as the upper trof axis remains in place to our west. Just like last night, we may keep showery precip around parts of the forecast area for the better part of the tonight period before it finally wanes in the pre-dawn hours. On Friday, more of the same. Looks to be a similar pattern to morning low clouds and fog, which could delay onset outside of the mountains. The fcst looks the same in terms of coverage that will go beyond climo in the afternoon. The environment should be conducive to a few pulse severe storms again as well, with sfc-based CAPE in the 2000 - 3000 J/kg range and sfc-delta Theta-e above 30 deg. Temps will be near normal as well.
SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/. As of 1230 pm EDT Thursday: Deeper moisture and higher PWAT values will be displaced off to our east this weekend as weak upper trough axis translates east and fills. Essentially, for the upcoming weekend, wx conds are expected to be pretty typical of early August, featuring a developing weaker flow regime, and seasonable humidity levels. Dirunally fired deeper convective chances will be close to climo values with piedmont maximum apparent temperatures approaching 95 each day.
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. As of 100 pm EDT Thursday: Still expectimg a weak westerly flow regime with embedded weak s/wv's rippling thru to exist atop the SE CONUS to start off the work week. PWAT progs starting on Monday depict a moisting trend after a weekend featuring below climo values. Despite limited Gulf moisture fetch, expecting a daily uptick in diurnal PoPs for showers and thunderstorms each day.
PoPs may increase further above climo Wednesday and Thursday as moisture begins to pool over the region as a frontal boundary lays out across the Mid-Atlantic to the north. Anticipate plenty of lower 90s Piedmont to upper 80s mountain valley max temperatures each afternoon, with mins a degree or so above climo through the period.
AVIATION /00Z FRIDAY THROUGH TUESDAY/. At KCLT and Elsewhere: Thunderstorms continue near some TAF sites and will develop near the others this evening, so have adjusted the TEMPOs for this. Convection should begin winding down around midnight and end overnight. That said, some showers could linger. Otherwise, expect another round of MVFR to IFR cigs, with LIFR or VLIFR possible in some locations. Vsby should generally be MVFR outside of the mountains, but IFR possible. KAVL should have the lowest vsby with LIFR likely and VLIFR possible. Expect another slow improvement after daybreak with vsby improving quickly but cigs slowly rising to VFR and/or scattering out around noon. Looks to be a relatively quick start to convection over the mountains with a slightly slower start elsewhere, so have adjusted PROB30s for that scenario. Winds will be anywhere from SW to SE, except gusty in storms, as outflow boundaries traverse the area. Light and variable wind overnight. S to SW wind expected during the afternoon.
Outlook: Coverage of thunderstorms will be more isolated to scattered during the afternoon and evening over the weekend. Morning fog/stratus restrictions will also be possible, especially over the usual mountain valleys. Diurnal storms will become more likely again from Monday onward.
Confidence Table .
23-05Z 05-11Z 11-17Z 17-18Z KCLT High 100% High 100% High 86% High 100% KGSP High 100% High 100% Low 53% High 100% KAVL High 100% High 95% Med 77% High 100% KHKY High 100% Med 79% Med 68% High 100% KGMU High 100% High 100% Low 48% High 100% KAND High 100% High 100% Low 48% High 100%
The percentage reflects the number of guidance members agreeing with the scheduled TAF issuance flight rule category. Complete hourly experimental aviation forecast consistency tables are available at the following link:
GSP WATCHES/WARNINGS/ADVISORIES. GA . None. NC . None. SC . None.
SYNOPSIS . CSH NEAR TERM . PM/RWH SHORT TERM . CSH LONG TERM . CSH AVIATION . RWH
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CHDS1 - Strom Thurmond Dam, SC||89 mi||66 min||SSE 1.9 G 5.1||88°F|
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Clemson, Clemson-Oconee County Airport, SC||12 mi||32 min||N 0||10.00 mi||Fair||81°F||69°F||67%||1015.6 hPa|
|Pickens County Airport, SC||20 mi||31 min||N 0||10.00 mi||Fair||82°F||76°F||84%||1016.3 hPa|
Link to 5 minute data for KCEU
Wind History from CEU (wind in knots)
|1 day ago||SE||Calm||W||Calm||N||E||N||Calm||N||N||N||Calm||SE||N||N||N|
|2 days ago||NW||NW||Calm||W||W||SW||W||W||Calm||W||Calm||Calm||W||W||Calm||W||W||Calm||Calm||N||Calm|
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GEOS Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Greenville-Spartanburg, SC (20,4,5,8)(on/off)  Help
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